Keep an eye out for events like Global Game Jam (http://www.globalgamejam.org/) where you can spend all weekend making a game, and have to present it to everyone at the end. It's really surprising how motivating something like that is, and how much you can get done.

Around Boston where I live, there are fairly regular smaller creative-jam events like this, which some indie game developers, artists, film-makers, and writers participate in. Maybe there's something similar near you?